hostapd、wpa_supplicant 交叉编译

简介

hostapd
    AP 侧进程，可以构建一个独立 AP 或者一个 RADIUS 认证服务器

wpa_supplicant
    STA 侧进程，包含了 802.1x、WPA 的请求工作

wpad
    = hostapd + wpa_supplicant，使用：wpad [hostapd | wpa_supplicant] [arguments]

hostapd and wpa_supplicant

编译所需源码文件

hostapd$ tree
.
├── hostapd-2.9.tar.gz
├── libnl-3.2.25.tar.gz
├── openssl-1.1.1a.tar.gz
└── wpa_supplicant-2.9.tar.gz

下载链接

• hostapd-2.9.tar.gz, wpa_supplicant-2.9.tar.gz http://w1.fi/releases/
• libnl-3.2.25.tar.gz http://www.infradead.org/~tgr/libnl/
• openssl-1.1.1a https://www.openssl.org/source/old/1.1.1/openssl-1.1.1a.tar.gz

依赖

hostapd 和 wpa_supplicant 均依赖 libnl 和 openssl

所以先编译 libnl 和 openssl，再编译 hostapd 和 wpa_supplicant。

libnl

$ tar -xvf libnl-3.2.25.tar.gz
$ cd libnl-3.2.25/
$ mkdir _install
$ ./configure CC=arm-linux-gnueabihf-gcc --prefix=$(pwd)/_install --host=arm-linux-gnueabihf
$ make
$ make install

openssl

$ tar -xvf openssl-1.1.1a.tar.gz
$ cd openssl-1.1.1a/
$ ./config no-asm shared --prefix=$(pwd)/__install

$ vim Makefile

-CROSS_COMPILE=
+CROSS_COMPILE=arm-linux-gnueabihf-

-CNF_CFLAGS=-pthread -m64
+CNF_CFLAGS=-pthread

$ make
$ make install

hostapd

$ tar -xvf hostapd-2.9.tar.gz
$ cd hostapd-2.9/hostapd
$ cp defconfig .config

$ vim .config

CONFIG_LIBNL32=y
+CFLAGS += -I /home/liyongjun/project/c/ARM/hostapd/libnl-3.2.25/_install/include/libnl3                                                                                    
+LIBS += -L /home/liyongjun/project/c/ARM/hostapd/libnl-3.2.25/_install/lib

+CFLAGS += -I /home/liyongjun/project/c/ARM/hostapd/openssl-1.1.1a/__install/include
+LIBS += -L /home/liyongjun/project/c/ARM/hostapd/openssl-1.1.1a/__install/lib

$ vim Makefile

+CC=arm-linux-gnueabihf-gcc                                                                                                                                                 
ifndef CC
CC=gcc
endif

$ make
Package libnl-3.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libnl-3.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libnl-3.0' found

报错，提示通过 pkg-config 没有搜索到 libnl-3.0 库，需要通过 PKG_CONFIG_PATH 环境变量指明 libnl-3.0.pc 所在的目录，以至于能够找到 libnl-3.0 库。

我们可以手动执行命令 pkg-config --list-all，可以看到列表中确实没有 libnl-3.0 库，因为在前面步骤中，我们是把 libnl-3.0 库安装在源码所在目录的，并且我们是交叉编译，编译出来的库也都是 ARM 架构的，也不应该安装到宿主机的默认动态库目录中。

解决办法：

$ export PKG_CONFIG_PATH=/home/liyongjun/project/c/ARM/hostapd/libnl-3.2.25/_install/lib/pkgconfig/
$ make

wpa_supplicant

$ tar -xvf wpa_supplicant-2.9.tar.gz
$ cd wpa_supplicant-2.9/wpa_supplicant/
$ cp defconfig .config

$ vim .config

CONFIG_LIBNL32=y
+CFLAGS += -I /home/liyongjun/project/c/ARM/hostapd/libnl-3.2.25/_install/include/libnl3
+LIBS += -L /home/liyongjun/project/c/ARM/hostapd/libnl-3.2.25/_install/lib

+CFLAGS += -I /home/liyongjun/project/c/ARM/hostapd/openssl-1.1.1a/_install/include
+LIBS += -L /home/liyongjun/project/c/ARM/hostapd/openssl-1.1.1a/_install/lib

$ vim Makefile

+CC=arm-linux-gnueabihf-gcc                                                                                                                                                 
ifndef CC
CC=gcc
endif

$ make
...
dbus/dbus_dict_helpers.c:10:10: fatal error: dbus/dbus.h: 没有那个文件或目录
   10 | #include 
      |          ^~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:1991：dbus/dbus_dict_helpers.o] 错误 1

报错，提示找不到 dbus/dbus.h 文件
解决办法，我们不需要 dbus 功能，所以直接关闭该功能
vim .config

# Add support for new DBus control interface
# (fi.w1.hostap.wpa_supplicant1)
-CONFIG_CTRL_IFACE_DBUS_NEW=y
+#CONFIG_CTRL_IFACE_DBUS_NEW=y

# Add introspection support for new DBus control interface
-CONFIG_CTRL_IFACE_DBUS_INTRO=y
+#CONFIG_CTRL_IFACE_DBUS_INTRO=y

make

over